Na-mediated carbon nitride realizing CO<sub>2</sub> photoreduction with selectivity modulation.

Han, Yi; Li, Wen; Bi, Chuanzhou; Liu, Jinyuan; Xu, Hangmin; Song, Hao; Zhong, Kang; Yang, Jinman; Jiang, Weiyi; Yi, Jianjian; Wang, Bin; Chu, Paul K; Ding, Penghui; Xu, Hui; Zhu, Xingwang

Na-mediated carbon nitride realizing CO₂ photoreduction with selectivity modulation.

Han, Yi; Li, Wen; Bi, Chuanzhou; Liu, Jinyuan; Xu, Hangmin; Song, Hao; Zhong, Kang; Yang, Jinman; Jiang, Weiyi; Yi, Jianjian; Wang, Bin; Chu, Paul K; Ding, Penghui; Xu, Hui; Zhu, Xingwang.

Afiliación

Han Y; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Li W; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Bi C; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Liu J; Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China.
Xu H; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Song H; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Zhong K; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Yang J; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: jmyang@ujs.edu.cn.
Jiang W; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Yi J; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China.
Wang B; Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China.
Chu PK; Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China.
Ding P; Laboratory of Organic Electronics, Department of Science and Technology, Linkoping University, Norrkoping SE-601 74, Sweden. Electronic address: penghui.ding@liu.se.
Xu H; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Zhu X; College of Environmental Science and Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225009, PR China. Electronic address: zxw@yzu.edu.cn.

J Colloid Interface Sci ; 670: 348-356, 2024 Sep 15.

Article en En | MEDLINE | ID: mdl-38763030

ABSTRACT

ABSTRACT

The depressed directional separation of photogenerated carriers and weak CO2 adsorption/activation activity are the main factors hampering the development of artificial photosynthesis. Herein, Na ions are embedded in graphitic carbon nitride (g-C3N4) to achieve directional migration of the photogenerated electrons to Na sites, while the electron-rich Na sites enhance CO2 adsorption and activation. Na/g-C3N4 (NaCN) shows improved photocatalytic reduction activity of CO2 to CO and CH4, and under simulated sunlight irradiation, the CO yield of NaCN synthesized by embedding Na at 550°C (NaCN-550) is 371.2 µmol g-1 h-1, which is 58.9 times more than that of the monomer g-C3N4. By means of theoretical calculations and experiments including in situ fourier transform infrared spectroscopy, the mechanism is investigated. This strategy which improves carrier separation and reduces the energy barrier at the same time is important to the development of artificial photosynthesis.

Palabras clave

CO(2) reduction; Carrier separation; Ion intercalation; Photocatalysts; g-C(3)N(4)

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